<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <title>无标题文档</title>

    <script src="../scripts/jquery-1.3.1.js"></script>
    <script type="text/javascript">
        $(function () {
            //
            $("#address").focus(function () {
                var str = $(this).val();
                if (str == "请输入账号") {
                    $(this).val("");
                }
            })
            $("#address").blur(function () {
                var str = $(this).val();
                if (str == "") {
                    $(this).val("请输入账号");
                }
            })
        })
    </script>
</head>

<body>
    <input type="text" id="address" value="请输入账号" />
    <input type="text" id="password" placeholder="请输入密码" />
    <input id="btn" type="button" value="登录" />
</body>
</html>
